@misc{10_1017_S000843950002988X,
     title = {Problems for {Solution}},
     journal = {Canadian mathematical bulletin},
     pages = {91--91},
     year = {1969},
     volume = {12},
     number = {1},
     doi = {10.1017/S000843950002988X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S000843950002988X/}
}